/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef ANDROID_BASE_SCOPEGUARD_H
#define ANDROID_BASE_SCOPEGUARD_H

#include <utility>  // for std::move

namespace android {
    namespace base {

        template<typename F>
        class ScopeGuard {
        public:
            ScopeGuard(F f) : f_(f), active_(true) {}

            ScopeGuard(ScopeGuard &&that) : f_(std::move(that.f_)), active_(that.active_) {
                that.active_ = false;
            }

            ~ScopeGuard() {
                if (active_) f_();
            }

            ScopeGuard() = delete;

            ScopeGuard(const ScopeGuard &) = delete;

            void operator=(const ScopeGuard &) = delete;

            void operator=(ScopeGuard &&that) = delete;

            void Disable() { active_ = false; }

            bool active() const { return active_; }

        private:
            F f_;
            bool active_;
        };

        template<typename T>
        ScopeGuard<T> make_scope_guard(T f) {
            return ScopeGuard<T>(f);
        }

    }  // namespace base
}  // namespace android

#endif  // ANDROID_BASE_SCOPEGUARD_H
